I\'m thinking of starting a project to make a game, maybe just a simple one, but still a game in 3D for the IPhone.
Though i still have a long way to go, learning object
Well, OpenGLES is a subset of OpenGL, so in case you had already known OpenGL it would be easier for you to switch to ES. To be honest, I don't know if it's worse or better approach to start with OpenGL for PC. What can be important on the other hand is the environment. If you want to implement some game for mobile device you have to consider limited resources, you would have to focus more on the optimization etc. So it would be probably better to start from learning openGL for embedded systems.
BTW, there is a really great OpenGLES tutorial for beginners. Code examples are written in Objective-C. http://iphonedevelopment.blogspot.com/2009/05/opengl-es-from-ground-up-table-of.html
Regards!